[SR-Users] Is there a way to detect inactive MSRP chat sessions without using SIP session timers

Hi, I am using MSRP feature of Blink client. I want to track when the chat starts and ends so I can free up server resources. Apparently Blink client does not send BYE when MSRP chat window closes. It does not support SIP session timers even. So potential use of SIP session timers (sst and dialog modules) is ruled out. Only possible way is to track every message that goes through the server and keep the session alive. If no message comes within “expiry time period”, server can send “bye” to all parties and tear up the session. Can you please comment if there are other approaches to solve this problem? If not, are they any modules that will help me implement the above approach easily? Thanks Pranathi